Basic String functions in PHP

How to use Basic String function in PHP

 

 


 

Similar to array built-in functions, there are some string built-in functions available in PHP to deal with strings. There are plenty of string functions in PHP which help in performing several manipulations on string data. In this article I will give you an idea on some basic string functions which are most frequently used in PHP scripts.

 Here is the list...

  1. strlen()
  2. strtoupper()
  3. strtolower() 
  4. ucfirst() 
  5. substring() 
  6. strcmp()

 

1. Strlen Function

String Length:This function gives you the length of the given string. Generally this function is used in validating user inputs, where the user is supposed to give specified length of characters.


Syntax:

Strlen(string);

Example:

<?php
 

$text = " e-Trainings";
print "Text length is =". strlen($text)."<br>";

?>

 Menu

 

2. Strtoupper Function

strtoupper($string): is a string conversion function. Convert given 
string into uppercase

 Syntax

 strtoupper($string)

Example:

<?php
 
$string="e-trainings";
 
print "<br>Upper=". strtoupper($string);
 

?>

  MenTop

3. Strtolower Function

strtolower(): is a string conversion function. Converts given string 
into lowercase

 Syntax

 

strtolower($string)

Example:

<?php
 
$string="e-trainings";
 
print "<br>Lower=". strtolower($string);
 
?>

  MoveTop

 

4. Ucfirst Function

ucfirst(): is a string conversion function. Converts given string 
first letter into uppercase. If any capital letter in the middle of
the word that will remain as it is.

  

 Syntax

 

ucfirst($string)

Example:

<?php
 
$string="e-Trainings";
 
print "<br>ucfirst=". ucfirst($string);
 
?>

 output

E-Trainings

  Menn↑

 

5. Substring Function

substring(): It returns a part of the string from given string

Syntax 

substr ($string , startposition , No_of_characters);

Example:

substr ($string , 3 , 4);

 

<?php
 
$string="Welcome";
 
print "<br>Substring =". substr ($string , 0 , 3); 
 
?>

 output

Substring = Wel

 

  GotoMenu

6. Strcmp Function

strcmp(); It compares two strings and returns a boolean value. This function we can be used to compare user input values and validate both are same or not.

Ex: comparing passwords  

 

Syntax: 

substr ($string , startposition , No_of_characters);

Example:

 

$boolan_value = strcmp("Cat", "cat") ;
 

Here I created one single PHP file with  all the above functions which makes you run in one shot.

 

  GoTop

index.php
 
 
<!DOCTYPE html>
<html>
<body>

<?php
 
$string="weLcome";
 
print "<br>Upper=". strtoupper($string);

print "<br>Lower=". strtolower($string);
  
print "<br>Sentence =". ucfirst($string);
 
//from 3rd position reads 4 characters (0 is 1st)
  

print "<br>Substring =". substr ($string , 3 , 4); 

$ans=strcmp("Cat", "cat") ;

if($ans == 0){

print( '<br> Both are same' ); 

}

else{
 
print(' <br> Both are not same'); 

}


print "<br>";
 

?>

</body>
</html>
 
 
output:
 
Upper=WELCOME
Lower=welcome
Sentence =WeLcome
Substring =come
Both are not same


 

 

Follow the Next Blog on Files in PHP

 

Comments

Post a Comment

Popular posts from this blog

Using javascript pass form variables to iframe src

Image
   Open PDF in Bootstrap Modal Window   This tutorial shows How to pass a JavaScript/jQuery variable to bootstrap modal view and sets it to iframe  src attribute. It passes value dynamically to src attribute of the iframe. When the user clicks a link, it opens the URL in a popup window. This  code shows the PDF in a Model without download option by hiding the toolbar.  To show PDF toolbar in modal, just add #toolbar=1   in the above script. index.php <!DOCTYPE html> <html lang= "en" > <head> <title>Bootstrap Model with PDF Example - coding-zon</title> <meta charset= "utf-8" > <meta name= "viewport" content= "width=device-width, initial-scale=1" > <link rel= "stylesheet" href= "https://cdn.jsdelivr.net/npm/bootstrap@4.6.2/dist/css/bootstrap.min.css" > <script src= "https://cdn.jsdelivr.net/npm/jquery@3.6.1/dist/jquery.slim.
Read more

Creating a new PDF by Merging PDF documents using TCPDF

Image
Merging two PDFs in PHP What is PDF? The Portable Document Format. PDF stands for "Portable Document Format". Essentially, the format is used when you need to save files that cannot be modified but still need to be easily shared and printed. PDF is one of the most commonly used file types around. PDFs generally contain shareable data, such as text or photo documents etc., and are accessible to anyone who has a computer or smartphone. Unlike a Word file, which requires Microsoft Word to view or edit, most browsers will open a PDF. How to merge PDFs? You can merge several documents into one. In PHP, you have a library called TCPDF which allows you to combine one or more PDF documents to one single document. In this article, we will create a new PDF by Merging PDF documents using TCPDF. Download the PDFMerger-tcpdf.zip here. Unzip it and copy it to the PHP server. Copy the PDF files into the same folder that you want to combine. Open the file: merge-pdf-example.php Provide
Read more

Import excel file into mysql in PHP

Image
  Upload Excel file and Import  it into MySQL in PHP  Create a table in some database with given code.   Download Library - extract it, rename the folder to library . Create index.php file with given code in a server. Create excelUpload.php with given code. Create db_config.php . Create one Excel file with some sample data as shown in the below image of Excel file. Create ' uploads ' folder in the same directory. Now start server, run the index.php. Upload a .xls file. If Everything is fine, Excel data inserted in the above created MySQL table - tbl_products . PHP Version:   5.5.11 Folder Structure      Query: CREATE TABLE IF NOT EXISTS `tbl_products` ( `id` int ( 11 ) NOT NULL AUTO_INCREMENT, `productname` varchar ( 100 ) DEFAULT NULL , `description` varchar ( 100 ) DEFAULT NULL , PRIMARY KEY (`id`) )     Top index.php <!DOCTYPE html> <html> <head> <title> coding-zon Demo - Upload Excel to MySQL in PHP </title> <lin
Read more